石元 丈晴

Isekai (lit. "another world") in music refers to songs and scores written for anime and games where characters are transported—often accidentally or involuntarily—into a parallel universe or fantasy world. In practice, it is a sub-current of Japanese anisong and soundtrack culture whose soundworld emphasizes the wonder, peril, and empowerment arcs typical of isekai narratives. Musically, isekai blends high-impact J‑pop/J‑rock openings (OPs) with hybrid orchestral scores: soaring string ostinati, heroic brass, choir pads, and EDM/rock rhythm sections used to frame battles, leveling-up sequences, and portal moments. Endings (EDs) often pivot to lyrical, nostalgic or bittersweet pop to reflect homesickness, found-family bonds, or the protagonist’s inner monologue.

Shib is an internet-born microgenre that blends lo‑fi hip hop, cloud rap, and alt‑R&B sensibilities into short, emotionally direct songs. It favors intimate vocals (sung, whispered, or half‑rapped), warm and dusty textures, and compact forms optimized for streaming and social media discovery. Typical productions feature looped guitar or piano motifs, soft trap drums, vinyl crackle or room noise, and reverbs/delays that create a late‑night, confessional atmosphere. Lyrically, shib gravitates toward nostalgia, heartbreak, and private reflection—music made to sound like messages recorded in a bedroom at 2 a.m.

Japanese VGM (video game music) refers to music created for Japanese video games, spanning arcade cabinets, home consoles, handhelds, PCs, and modern platforms. It is melody-forward, loop-friendly, and highly thematic, often built on short motifs and clear leitmotifs for characters, locations, and events. Early sound palettes centered on PSG and FM synthesis; later generations added PCM sampling, CD audio, and full orchestral/hybrid production. Stylistically it blends electronic programming with influences from classical orchestration, jazz fusion, kayōkyoku/J‑Pop hooks, and progressive rock, while sometimes coloring harmony or melody with Japanese scales. Its catchy writing, memorable hooks, and tight arrangements have made it globally influential well beyond games.

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.